X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libopenjpeg%2Fbio.c;h=4c02f464d8da86f2b0ac743a6ce472c0006edd0e;hb=29ea3dde47818da3eecb917ebb1db797a3e80d44;hp=47d7299ee07a83179f51664178b82d9503fa9f48;hpb=f61cda9b7d83e0202cbaa15bac45d358e9b3652e;p=openjpeg.git

diff --git a/libopenjpeg/bio.c b/libopenjpeg/bio.c
index 47d7299e..4c02f464 100644
--- a/libopenjpeg/bio.c
+++ b/libopenjpeg/bio.c
@@ -1,9 +1,10 @@
 /*
+ * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
+ * Copyright (c) 2002-2007, Professor Benoit Macq
  * Copyright (c) 2001-2003, David Janssens
  * Copyright (c) 2002-2003, Yannick Verschueren
- * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
- * Copyright (c) 2005, HervŽ Drolon, FreeImage Team
- * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
+ * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
+ * Copyright (c) 2005, Herve Drolon, FreeImage Team
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -28,9 +29,43 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-
 #include "opj_includes.h"
 
+/** @defgroup BIO BIO - Individual bit input-output stream */
+/*@{*/
+
+/** @name Local static functions */
+/*@{*/
+
+/**
+Write a bit
+@param bio BIO handle
+@param b Bit to write (0 or 1)
+*/
+static void bio_putbit(opj_bio_t *bio, int b);
+/**
+Read a bit
+@param bio BIO handle
+@return Returns the read bit
+*/
+static int bio_getbit(opj_bio_t *bio);
+/**
+Write a byte
+@param bio BIO handle
+@return Returns 0 if successful, returns 1 otherwise
+*/
+static int bio_byteout(opj_bio_t *bio);
+/**
+Read a byte
+@param bio BIO handle
+@return Returns 0 if successful, returns 1 otherwise
+*/
+static int bio_bytein(opj_bio_t *bio);
+
+/*@}*/
+
+/*@}*/
+
 /* 
 ==========================================================
    local functions
@@ -38,39 +73,39 @@
 */
 
 static int bio_byteout(opj_bio_t *bio) {
-  bio->buf = (bio->buf << 8) & 0xffff;
-  bio->ct = bio->buf == 0xff00 ? 7 : 8;
-  if (bio->bp >= bio->end) {
-    return 1;
-  }
-  *bio->bp++ = bio->buf >> 8;
-  return 0;
+	bio->buf = (bio->buf << 8) & 0xffff;
+	bio->ct = bio->buf == 0xff00 ? 7 : 8;
+	if (bio->bp >= bio->end) {
+		return 1;
+	}
+	*bio->bp++ = bio->buf >> 8;
+	return 0;
 }
 
 static int bio_bytein(opj_bio_t *bio) {
-  bio->buf = (bio->buf << 8) & 0xffff;
-  bio->ct = bio->buf == 0xff00 ? 7 : 8;
-  if (bio->bp >= bio->end) {
-    return 1;
-  }
-  bio->buf |= *bio->bp++;
-  return 0;
+	bio->buf = (bio->buf << 8) & 0xffff;
+	bio->ct = bio->buf == 0xff00 ? 7 : 8;
+	if (bio->bp >= bio->end) {
+		return 1;
+	}
+	bio->buf |= *bio->bp++;
+	return 0;
 }
 
 static void bio_putbit(opj_bio_t *bio, int b) {
-  if (bio->ct == 0) {
-    bio_byteout(bio);
-  }
-  bio->ct--;
-  bio->buf |= b << bio->ct;
+	if (bio->ct == 0) {
+		bio_byteout(bio);
+	}
+	bio->ct--;
+	bio->buf |= b << bio->ct;
 }
 
 static int bio_getbit(opj_bio_t *bio) {
-  if (bio->ct == 0) {
-    bio_bytein(bio);
-  }
-  bio->ct--;
-  return (bio->buf >> bio->ct) & 1;
+	if (bio->ct == 0) {
+		bio_bytein(bio);
+	}
+	bio->ct--;
+	return (bio->buf >> bio->ct) & 1;
 }
 
 /* 
@@ -79,74 +114,74 @@ static int bio_getbit(opj_bio_t *bio) {
 ==========================================================
 */
 
-opj_bio_t* bio_create() {
-  opj_bio_t *bio = (opj_bio_t*)opj_malloc(sizeof(opj_bio_t));
-  return bio;
+opj_bio_t* bio_create(void) {
+	opj_bio_t *bio = (opj_bio_t*)opj_malloc(sizeof(opj_bio_t));
+	return bio;
 }
 
 void bio_destroy(opj_bio_t *bio) {
-  if(bio) {
-    opj_free(bio);
-  }
+	if(bio) {
+		opj_free(bio);
+	}
 }
 
 int bio_numbytes(opj_bio_t *bio) {
-  return (bio->bp - bio->start);
+	return (bio->bp - bio->start);
 }
 
 void bio_init_enc(opj_bio_t *bio, unsigned char *bp, int len) {
-  bio->start = bp;
-  bio->end = bp + len;
-  bio->bp = bp;
-  bio->buf = 0;
-  bio->ct = 8;
+	bio->start = bp;
+	bio->end = bp + len;
+	bio->bp = bp;
+	bio->buf = 0;
+	bio->ct = 8;
 }
 
 void bio_init_dec(opj_bio_t *bio, unsigned char *bp, int len) {
-  bio->start = bp;
-  bio->end = bp + len;
-  bio->bp = bp;
-  bio->buf = 0;
-  bio->ct = 0;
+	bio->start = bp;
+	bio->end = bp + len;
+	bio->bp = bp;
+	bio->buf = 0;
+	bio->ct = 0;
 }
 
 void bio_write(opj_bio_t *bio, int v, int n) {
-  int i;
-  for (i = n - 1; i >= 0; i--) {
-    bio_putbit(bio, (v >> i) & 1);
-  }
+	int i;
+	for (i = n - 1; i >= 0; i--) {
+		bio_putbit(bio, (v >> i) & 1);
+	}
 }
 
 int bio_read(opj_bio_t *bio, int n) {
-  int i, v;
-  v = 0;
-  for (i = n - 1; i >= 0; i--) {
-    v += bio_getbit(bio) << i;
-  }
-  return v;
+	int i, v;
+	v = 0;
+	for (i = n - 1; i >= 0; i--) {
+		v += bio_getbit(bio) << i;
+	}
+	return v;
 }
 
 int bio_flush(opj_bio_t *bio) {
-  bio->ct = 0;
-  if (bio_byteout(bio)) {
-    return 1;
-  }
-  if (bio->ct == 7) {
-    bio->ct = 0;
-    if (bio_byteout(bio)) {
-      return 1;
-    }
-  }
-  return 0;
+	bio->ct = 0;
+	if (bio_byteout(bio)) {
+		return 1;
+	}
+	if (bio->ct == 7) {
+		bio->ct = 0;
+		if (bio_byteout(bio)) {
+			return 1;
+		}
+	}
+	return 0;
 }
 
 int bio_inalign(opj_bio_t *bio) {
-  bio->ct = 0;
-  if ((bio->buf & 0xff) == 0xff) {
-    if (bio_bytein(bio)) {
-      return 1;
-    }
-    bio->ct = 0;
-  }
-  return 0;
+	bio->ct = 0;
+	if ((bio->buf & 0xff) == 0xff) {
+		if (bio_bytein(bio)) {
+			return 1;
+		}
+		bio->ct = 0;
+	}
+	return 0;
 }